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(No Model.)

W. H. PAGE. DOME FOR STEAM BOILERS. Y No. 536,041 Patented Mar. 19, 1895.

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` G I IQ *f Timms STATES aTnNr este@ WILLIAM H. PAGE, OF NORWIOH,CONNECTICUT, ASSIGNOR vTO THE NVM. H.

PAGE BOILER COMPANY, OFSAME PLACE.

DOME FOR STEAM-solteras.

SPECIFICATION forming" part f v:Letta-22653Pra'telvlt N0. 556,041, datedMarch 19, 1 895. Application filed January 9, 1895. i Serial No.534,373.A (No model.)

To all whom it may concern:

Be itknown that I, WILLIAM'H. PAGE, a citizen of the United States,residing at Norwich, in the county of New London and State ofConnecticut, have invented certain new and useful Improvements in Domesfor Steam-y Boilers; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use t-hesamen 4 My invention relates to steam and hot water boilers of thatclass technically known to the art as sectional boilers, in which thestructure is built up of a number of cast metal sections to produce thetire pot, the water containing sections and a dome section, whichsections are superposed one uponrthe other and suitably united together.

The special feature of the improvement contemplated by this inventionrelates to the'top section or the steamdome section,`cast in a singlepiece of metal, and comprising upper and lower walls substantiallyparallel to each other, an annular vsurrounding wall which joins theedges of said horizontal walls and forms a chamber therewith, a centralwater opening or nipple in the lower horizontal wall, and vertical smokeflues arranged in circular series around said central opening or nippleand joined to the top and bottom walls through which said smoke finesopen, whereby the products of combustion are carried by the smoke finesthrough the steam dome, and the water and steam from the other sectionsof the boiler are free to pass and circulate through the central openingor nipple in the lower wall of the section.

To enable others skilled in the art to which this invention relates tomore readily understand my improvement, I have shown the preferredembodiment thereof in the accompanying drawings, forming a part of thisspecification, and in which- Figure l is a vertical sectional elevationof one type of sectional boiler in vwhich my improved steam dome sectionis used. Fig. 2 is a detail perspective view of the dome sectiondetached. Fig. 3 is a sectional View of another type of sectional boilerwith which my ydome section may be advantageously combined. Like lettersof referencedenote corresponding parts in all the figures .of thedrawings.

A denotes my improved dome section which is cast in a single piece ofmetal. This section consists of the upper horizontal wall, a., the lowerhorizontal wall b, the annular vertic'al wallfc, a series of verticalsmoke pipes d, and a central opening or nipple e in the lower wall b,within the circular series of smoke pipes d, and concentric therewith.The horizontal walls a, b, are substantially parallel to each other, andthe annular inclosing wall c lies substantially at right angles to thewalls a, b, although saidannnlar wall c may be slightly inclined, asshown by Fig. l, to give to the dome a tapered form in vertical section,whereby the diameter of the dome A at its upper part is somewhat inexcess of the lower end of the dome. This annular vertical wall c, isjoined to the edges of the top and bottom, o., b, and it forms therewitha chamber, G,`in which is contained the hot water and steam of ytheboiler. The vertical smoke pipes are arranged in circular series around,and concentric with, the central opening or nipple ein the lower Wall bof the dome section, and said smoke pipesare integral with the walls a,b, of the section. The ends of the pipes d open through the top andbottom of the section, and theyserve as smoke fines to carry the smokeand products of combustion through the steam and hot water chamber Gofthe domesection, thereby ntilizing the heat to the best advantage. Theopening e in the bottom of the section is preferably bounded by a flangef which depends below the wall b and produces the nipple, the latteraffording a convenient means for the attachment of the water heatingsections of the boiler to the top or dome section A.

In Fig. l of the drawings I have shown my improved dome section Acombined with two Water heating sections H and I, a iire pot sec- 9 tionJ, and a masonry inclosing wallK. The crown sheet of the fire pot isformed by the lower solid wall of the section I, and the section H hasnipples at its top and bottom which are coupled, respectively, to thenipple f of roo section A and to the nipple on the upper side of thesection I. The section I-I has transverse smoke 'lues, h, formed in it,which tlues h are in vertical alignment with the circular series ofvertical smoke fines d of my improved steam dome. The wall of masonry Ksurrounds the sections of the boiler, and it is surmounted by a castmetal cap 7a which forms the smoke space, from which leads the exit pipe7c.

The dome section A has flanged openings, g, to which are coupled thecirculating pipes G', one of which is shown in Fig. l.

In Fig. 3 of the drawings I have shown the dome section combined withportable sec tional boilers. In the type of boilers shown by thisfigure, the smoke is compelled to circulate in or take a tortnous coursethrough the boiler, and this is produced by combining with the dome A,the fire pot J, and the inclosing casing L, certain forms of watersections M, N, which are different in diameter and situated in alternaterelation to one another. 'The larger sections fm are provided withtransverse smoke dues M which extend through them, and each section isof such diameter as to fit closely against the inclosing casing. Thesmaller sections N present practically continuous surfaces to the dame,heat, the., and they are of less diameter than the sections m, so thatthe products of combustion are compelled to pass along the bottom sidesof the sections N, up and around the edges thereof, and then pass towardthe center oi' the boiler, and up through the smoke lues M in the nextupper section, m, of the boiler.

In Fig. 3, I have shown the smaller heat deliectng section, N, next tothe dome section, A, to cause the heat and products of combustion topass around the edges of said section, N, and thence inwardly over thesection N to the smoke fines in the steam dome. In Fig. I, however, Ihave illustrated the deflecting and fiue sections transposed, that is,the flue section is next to the steam dome, and the de- Iiecting sectionis below the tine section. This arrangement of sections causes theproducts of combustion, after passing around thelower detlectingsection, to circulate between the two sections, and thence pass throughthe smoke ues in boththe iiue section and the dome section, a part ofthe heat and products of combustion also passing around the dome sectionbecause there is a space provided between the dome section and thesurrounding or inclosing walls of the furnace, as clearly shown.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

A dome section A, cast in a single piece, having the top and bottomWalls a, b, joined at their edges by an annular wall, c, and forming thesteam and water chamber, a central opening or nipple, e, in the bottomb, and a circular series of vertical smoke pipes d concentric with theopening or nipple e, the ends ot' said smoke pipesy opening through thetop and bottom, av, b, of said section, as set forth.

In testimony whereof I aix my signature in presence of two witnesses.

WILLIAM H. PAGE.

Witnesses:

LUoIUs BROWN, HIRAM R. MILLS.

